Post-hole machine



(No Model.)

W. W. & G. F. NIVISON.

V POST HOLE MACHINE. No. 397,383. Patented Fe`b.-5, 1889.v

N PEYERS. hnlo-Lnhognpher, wanhngton, D. c.

IIBD STATES IVILLIAM lV. NIVISON ANI) GEORGE F. NIVISON, OF I/ESIER,MICHIGAN.

POSTHHOLE lVlAClllN.

SPECIFICATION forming part of Letters Patent No. 397,383, dated February5, 1889.

Y d .Application filed September 3, l 88S. Serial No. 284,443. (Nomodel.)

Be it known that we, lVILLIAM ll". NilvlsoN and GEORGE 11. NIvil'sON,citizens olithe United States, residing at Lester, in t-he county olBranch and State ot' Michigan, .have :invented certain new and usefulImprovements in Iost-llole llilachincs; and wedo declare the followingto be a full, clear, and exact description of the invention, such aswill enable others skilled in the art to which it appertains to make anduse the same.

This invention has relation to improvements in post-hole diggers; and itconsists, essentially, of two bars of angular form pivotally connectedtogether by means of a long` plate, or two plates secured parallel tothesaid bars and on opposite sides thereof, so that one et" the bars maymove with :respect to the plates, while the other one moves therewith, aloop secured to one ot' the hars above angular points thereon,auger-pods secured to the lower ends oll the bars or levers, a pivotedgravitating latch having a notch, and a stud on one ol the levers toengage the said notch, as will be hereinafter set lorth, andparticularly pointed out in the elainl ap pended.

Before describing the details et' const ruction we desire to say that weare well aware that it is not new to provide a pest-hole digger composedof two angular levers pivoted together and each carrying a stop, and toemploy a pivoted gravitating latch for loelc ing the levers in anoperative position.

lVe are also aware o'l the patent graiited to J. J. Armstrong, November21,1982, in which a post-hole digger shown as composed of two bent barspreferably 'formed Yfrom wood, and provided with spade-blades, so thatthey may be used separately as spades, or in coinbination as a post-holedigger; but in such device the levers are conneetwl together by bladeswhich `inoieetsullieienlly from the lei vers to forni cutters.

In the accompanying drawings, Figure 'l is a side elevation ot' apost-hole-boring machine constructed according to our invention. Fig. 2a longitudinal sectional view olf the saine, and Fig. 3 is a transversesectional view taken on the line of Fig. l.

Referringl by letter to the said drawings,

A B ind ical e two levers, which are et a l'orni substantially as shown,having their upper ends bent laterally to `forni handles a, from whichpoint to the point o they are approxi mately straight, and from thelatter point `for the portion ol' their length are bent at an obtuseangle laterally.

(l iiulicates a broad llat loop, which has its ends secured to the leverB, and recen es through it the leve A, so that the saine may move treely therein.

I) I) indicate two elongated plates, which are ot a rectangular forni.These plates are pivoted at their upper corners to the levers A A and B,respectively, as shown at d, and the lever B is secured tothe lowercontiguous corners of the said plate, as shown at e.

It should be here observed that the levers are not directly pivotedtogether, but that the plates D connect them. It should also be observedthat these plates are very long, and that they extend down the sides ol'the levers connecting' them, and` will 1n'event any torsional straindurin operation. VlVe attach iniportanee to the employment of theseplates and to the fact that the levers are not pivoted together.

E indicates the pods or blades, which may be ot' any suitableconstruction, and are se cured to the lower outwardly-eurved ends ot'the levers A B.

l' indicates a gravitating latch, which pivoted to the lever A, adjacentto the handles, and provided with a notch near its opposite end, asshown, to engage a stud, f, on the lever B. It will be seen that thislatch by its gravity will normally bear against the said stud F and locktherewith, when, by siniply lifting its outer or weighted end, the samewill be disengaged from the said stud and the levers and pods tree tomove.

Having lcscribe'd our invention, what we claim is-- The limprovedpost-lade digger herein described, consisting, essentially, ot' the twoangular levers A B, having their upper ends bent laterally to l'orinhandles, and their lower ends curved outwardly and inwardly to receivepods, the loop (l, secured to one of the levers and receiving through itthe other lever, the long plates D, pivoted at their upper cor- IOO nersto the respective levers, and also pivoted In testimony whereof We affixour signatures at their lower Corners to the lever l5 only, in presenceof two witnesses. whereby stability will be rendered in the op-VILLIA'A'I XV. NIVISON. eration, the pivoted gl'z'witatillg lever F,l1zw- GEORGE F. NIVISON.

5 ing a notch, as shown, and the Stud on the 'tnesses:

lever B, adapted lo receive the said notch, T. J N IXON,

Substantially as Speoied. M. O. NWISON.

